I was stuck in a problem that how to re use access token, once user has authenticated by Twitter (on call back URL). I got it working. There was problem in my understanding about request token vs access token. When user first time comes on call backed URL. I take request token and token secret from session and prepare the access token. Here the place where I was confused.

If you want to develop a Twitter app. You need to register your application with Twitter. That means you should have your production URL ready before you think to start your development. When you finished with registration, you will receive consumer key and consumer secret. These unique credentials will help your app to interact with Twitter. No big deal. You can visit your all registered applications on http://twitter.com/oauth. And to register for new app you need to visit http://twitter.com/apps/new